"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MW34-6JP : accessed 28 Nov 2013), Klaas Jonker, Grand Haven, Ottawa, Michigan, United States; citing sheet 366D, family 0, NARA microfilm publication T9-0600
↑ Staat van landverhuizers in 1854 Groningen (Provincie) (toegang 2-04-23-02) Inventarisnummer 26-I